utils: add tal_hex() helper.

This is a shortcut when the data being dumped is a tal array.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>

utils.c

@@ -10,6 +10,11 @@ char *tal_hexstr(const tal_t *ctx, const void *data, size_t len)
 	return str;
 }
 
+char *tal_hex(const tal_t *ctx, const tal_t *data)
+{
+	return tal_hexstr(ctx, data, tal_len(data));
+}
+
 u8 *tal_hexdata(const tal_t *ctx, const void *str, size_t len)
 {
 	u8 *data = tal_arr(ctx, u8, hex_data_size(len));